I've had problems with ants at my house for the last 2 years. We tried to kill them organically by using Borax and that didn't work. We made it about 10 different ways using recipes we found online and even though the ants ate it, they kept coming. I didn't want to poison the Earth any more than it already is, but eventually we tried 3 different ant poisons from Terro. We tried the kind you spread, a spray and gel bait traps. None of those worked and I hated spraying poison around my yard. I found info about using Diatomaceous Earth online and ordered this product and the duster for about $30. I dusted it all over lines of ants that were going up walls and under the siding. I kicked around some ant hills and dusted it all over them. I probably dusted about 30 spots in my yard. I checked on them throughout the day and would see the ants trying to get up the wall and then falling after climbing about 4-6 inches. Within the day, there was not an ant in sight. I checked a bunch more times today and found nothing. They are all gone!!!
I only needed about 1/2 of a pound to do it. I plan on dusting after any heavy rains but doubt I'll use more than a 1/4 of the bag all summer. I can't wait to share this amazing and 100% organic trick with anyone that I know that has ants. Best $30 I ever spent.

Tip: Make sure you wear goggles/glasses and a mask. You DON'T want to breath this stuff in. You can order masks from Amazon when you order this stuff.

UPDATE: Today is 7/21/15. It's been about 7 weeks since I first used D.E. I figured I would need to reapply it after a heavy rain or every few weeks, but that has not been necessary at all. I dusted a few times around specific areas where I saw ants during the first week, but haven't used any since. I have not seen a single ant inside my house since May. This has been one of the most valuable purchases I've ever made on Amazon.

Having realized in horror that I had a mild bedbug infestation confined to my bedroom, I researched for the most effective, natural way of getting rid of them (I was not in the market to spend hundreds, let alone thousands, of dollars on chemical toxins that might not work that well). This led me to this product, step one of my strategy. Step two required learning as much as possible about this pest. So here's how I got rid of them:

1- Set my alarm clock to 2:30 AM. Woke up at this hour to find that's about feed time for this critters (averaging between 1:30 and 3:30 AM), so I was able to spot the hiding places from where they came out to get their meal. Does not matter if you turn the light on, they still come out. I did this for a whole month to monitor how many kept coming out throughout the DE powder treatment.

2- Using a duster, I applied as thin as possible a layer of DE powder around and underneath my bed frame, as well as the trail I was able to track from the hiding places towards my bed. Basically half my room. I also used a bit of the dust on the rest of the floor and any of the horizontal surfaces in it, but mainly the area around the bed and the hiding spots.

3- Since it was, thankfully, the early summer days, I was able to sleep without covers throughout the weeks in which I did the treatment. All bed covers, blankets, pillow cases and the like were sealed in bags in which I also applied the dust. I kept those tightly sealed for a good 3 months.

4- By the second week, I had come across and killed close to 23 of the suckers, but began seeing some dried out remains of what looked like dead bedbugs, but these could also simply be shed skins from molting, so I still did not remove the dust. I was no longer being bitten.

5- By the fifth week the bedbugs were not coming out anymore, but I did not remove the dust.

6- Three and 1/2 months had passed and it seemed the problem was solved, yet this parasite had me so paranoid that I kept waking up in the wee hours to see if anything was making its way towards my bed from anywhere around the room. I looked around the hiding places and found several of the dried out remains of the bedbugs. Success?

7 - By the fourth month I got tired of having a room full of dust and felt confident that my strategy had paid off, so I vacuumed the room. Took out the bags with bed covers, blankets and the like and found some more dried out shells of former bedbugs, picked them out of there and then put all that stuff in the washing machine.

6- Five whole months had passed, and even though the bedbugs had long stopped coming out, the trauma of having had a bedbug infestation kept me waking up at dawn and turning on the lights for a few minutes form many months. But to date (that's April 2013) there is no sign of them anywhere in my bedroom or anywhere else in my apartment, and even spider beetles (which can sometimes be confused for bedbugs but are not blood parasites) have disappeared.

My bedbug problem happened a year ago and I was able to solve it in a matter of weeks, but it took me this long to write a review of the DE dust solution because of the fact that bedbugs can last a year without feeding, so in a worst case scenario the problem could have reappeared. But with a full year of bedbug freedom, I am confident to recommend Food Grade Diatomaceous Earth as a natural pesticide that did a wonderful job while being extremely cheap and non-toxic to boot. I only had to use less than a quarter of the bag (in fact, the duster still has some left-over dust from the one and only time I sprayed it). Note, however, that an effective treatment of eradication requires diligence. These parasites can hide anywhere, so you have to do your best at identifying their hiding spots, learning their schedules and taking precautions to not let them spread out anywhere else. Also, I do not suffer asthma, so I had no problem sleeping in my room while the dust sat on the floor, but if you do suffer from any respiratory issues, I would suggest staying in a different room or a different residence if possible for a few weeks. Every once in a while I still apply the dust around the bed, just in case, and ever since I started using it, I've never felt any discomfort, irritation, or any health issues at all, so from my perspective, this stuff is harmless. Remember, too, that this is the FOOD GRADE Diatomaceous Earth, not the stuff used for swimming pool filters.
Hope this helps.